Rotstein is a Minecraft's redstone-inspired simulation game where player builds logic circuits and.

WASD.
1, 2, 3, …, 0, Shift-1, Shift-2, …, Shift-0 -- pick tile in hotbar.
LMB -- place tile.
RMB -- remove tile.
MMB -- activate tile (works on levers).
R -- rotate selected tile.
Z, X -- zoom in and out.

Basically ciruits work like Minecraft's redstone.
Tiles from left to right:
Wood, Stone, Iron, Redstone Block, Redstone Wire, Redstone Brdige, NOT Gate, OR Gate, AND Gate, XOR Gate, Repeater, Lever.

A full adder in Rotstein:

~ or ` (Tilde or Grave) -- open console.

Rotstein commands are:

• world save "name" -- saves world to "name".rts
• world load "name" -- loads world from "name".rts
• label new "text" -- creates a label at Player's position with text "text".
• label delete -- deletes a label closest to player.